Browse Publications Technical Papers 2004-01-1359
2004-03-08

Turbocharging Technologies to Meet Critical Performance Demands of Ultra-Low Emissions Diesel Engines 2004-01-1359

Over the past decade, the dramatic improvements in power density, responsiveness and low emissions in both turbo-diesel passenger vehicle and commercial vehicle engines have demanded significant alterations to the basic architecture of turbochargers. The emissions regulations already enacted worldwide, but not yet in force will demand further reaching changes to the basic concept of turbocharging. This paper explores the complex linkage between the aerodynamic machine (the turbocharger), the positive displacement machine (the engine), their new role as feed-gas generators for aftertreatment devices, and the divergence in requirements between passenger vehicle and commercial vehicle applications.
The next generation requirements (2007) for both passenger vehicle and commercial vehicle diesel engines will be driven by the need for increased EGR rates. The following generation requirements (2010) will be driven by the unique demands of Lean NOx Adsorbers or Selective Catalytic Reduction systems.
Due to the different emissions tests and market drivers, the critical-to-quality requirements will be different for the PV and CV segments. The 2007 regulations will drive turbocharger architectures for CV engines that can operate at pressure ratios 4.5/1 and higher, and can mitigate the negative fuel economy impact of high levels of EGR. These regulations will drive turbocharger architectures for PV engines that can provide increased responsiveness, particularly off-idle.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Preview Document Add to Cart
Members save up to 17% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.
We also recommend:
TECHNICAL PAPER

Computational Study of Diesel Engine Downsizing Using Two-StageTurbocharging

2004-01-0929

View Details

TECHNICAL PAPER

Onboard Emissions Monitoring on a HD Truck with an SCR System Using Nox Sensors

2004-01-1290

View Details

TECHNICAL PAPER

Advanced Gasoline Engine Turbocharging Technology for Fuel Economy Improvements

2004-01-0988

View Details

X